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Commit | Line | Data |
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ac6c561b MR |
1 | #include "cache.h" |
2 | #include "refs.h" | |
3 | #include "strbuf.h" | |
4 | #include "worktree.h" | |
750e8a60 | 5 | #include "dir.h" |
8d9fdd70 | 6 | #include "wt-status.h" |
ac6c561b | 7 | |
51934904 MR |
8 | void free_worktrees(struct worktree **worktrees) |
9 | { | |
10 | int i = 0; | |
11 | ||
12 | for (i = 0; worktrees[i]; i++) { | |
13 | free(worktrees[i]->path); | |
69dfe3b9 | 14 | free(worktrees[i]->id); |
92718b74 | 15 | free(worktrees[i]->head_ref); |
51934904 MR |
16 | free(worktrees[i]); |
17 | } | |
18 | free (worktrees); | |
19 | } | |
20 | ||
1ceb7f90 MR |
21 | /* |
22 | * read 'path_to_ref' into 'ref'. Also if is_detached is not NULL, | |
832c0e5e | 23 | * set is_detached to 1 (0) if the ref is detached (is not detached). |
1ceb7f90 MR |
24 | * |
25 | * $GIT_COMMON_DIR/$symref (e.g. HEAD) is practically outside $GIT_DIR so | |
26 | * for linked worktrees, `resolve_ref_unsafe()` won't work (it uses | |
27 | * git_path). Parse the ref ourselves. | |
28 | * | |
29 | * return -1 if the ref is not a proper ref, 0 otherwise (success) | |
30 | */ | |
31 | static int parse_ref(char *path_to_ref, struct strbuf *ref, int *is_detached) | |
32 | { | |
33 | if (is_detached) | |
34 | *is_detached = 0; | |
35 | if (!strbuf_readlink(ref, path_to_ref, 0)) { | |
36 | /* HEAD is symbolic link */ | |
37 | if (!starts_with(ref->buf, "refs/") || | |
38 | check_refname_format(ref->buf, 0)) | |
39 | return -1; | |
40 | } else if (strbuf_read_file(ref, path_to_ref, 0) >= 0) { | |
41 | /* textual symref or detached */ | |
42 | if (!starts_with(ref->buf, "ref:")) { | |
43 | if (is_detached) | |
44 | *is_detached = 1; | |
45 | } else { | |
46 | strbuf_remove(ref, 0, strlen("ref:")); | |
47 | strbuf_trim(ref); | |
48 | if (check_refname_format(ref->buf, 0)) | |
49 | return -1; | |
50 | } | |
51 | } else | |
52 | return -1; | |
53 | return 0; | |
54 | } | |
55 | ||
92718b74 MR |
56 | /** |
57 | * Add the head_sha1 and head_ref (if not detached) to the given worktree | |
58 | */ | |
59 | static void add_head_info(struct strbuf *head_ref, struct worktree *worktree) | |
60 | { | |
61 | if (head_ref->len) { | |
62 | if (worktree->is_detached) { | |
63 | get_sha1_hex(head_ref->buf, worktree->head_sha1); | |
64 | } else { | |
65 | resolve_ref_unsafe(head_ref->buf, 0, worktree->head_sha1, NULL); | |
66 | worktree->head_ref = strbuf_detach(head_ref, NULL); | |
67 | } | |
68 | } | |
69 | } | |
70 | ||
51934904 MR |
71 | /** |
72 | * get the main worktree | |
73 | */ | |
74 | static struct worktree *get_main_worktree(void) | |
1ceb7f90 | 75 | { |
51934904 | 76 | struct worktree *worktree = NULL; |
1ceb7f90 | 77 | struct strbuf path = STRBUF_INIT; |
51934904 | 78 | struct strbuf worktree_path = STRBUF_INIT; |
51934904 | 79 | struct strbuf head_ref = STRBUF_INIT; |
92718b74 MR |
80 | int is_bare = 0; |
81 | int is_detached = 0; | |
1ceb7f90 | 82 | |
69dfe3b9 | 83 | strbuf_addstr(&worktree_path, absolute_path(get_git_common_dir())); |
92718b74 MR |
84 | is_bare = !strbuf_strip_suffix(&worktree_path, "/.git"); |
85 | if (is_bare) | |
51934904 MR |
86 | strbuf_strip_suffix(&worktree_path, "/."); |
87 | ||
88 | strbuf_addf(&path, "%s/HEAD", get_git_common_dir()); | |
89 | ||
92718b74 MR |
90 | if (parse_ref(path.buf, &head_ref, &is_detached) < 0) |
91 | goto done; | |
92 | ||
93 | worktree = xmalloc(sizeof(struct worktree)); | |
94 | worktree->path = strbuf_detach(&worktree_path, NULL); | |
69dfe3b9 | 95 | worktree->id = NULL; |
92718b74 MR |
96 | worktree->is_bare = is_bare; |
97 | worktree->head_ref = NULL; | |
98 | worktree->is_detached = is_detached; | |
750e8a60 | 99 | worktree->is_current = 0; |
92718b74 MR |
100 | add_head_info(&head_ref, worktree); |
101 | ||
102 | done: | |
1ceb7f90 | 103 | strbuf_release(&path); |
51934904 MR |
104 | strbuf_release(&worktree_path); |
105 | strbuf_release(&head_ref); | |
106 | return worktree; | |
1ceb7f90 MR |
107 | } |
108 | ||
51934904 | 109 | static struct worktree *get_linked_worktree(const char *id) |
ac6c561b | 110 | { |
51934904 | 111 | struct worktree *worktree = NULL; |
ac6c561b | 112 | struct strbuf path = STRBUF_INIT; |
51934904 | 113 | struct strbuf worktree_path = STRBUF_INIT; |
51934904 | 114 | struct strbuf head_ref = STRBUF_INIT; |
92718b74 | 115 | int is_detached = 0; |
ac6c561b | 116 | |
1ceb7f90 MR |
117 | if (!id) |
118 | die("Missing linked worktree name"); | |
ac6c561b | 119 | |
69dfe3b9 | 120 | strbuf_git_common_path(&path, "worktrees/%s/gitdir", id); |
51934904 MR |
121 | if (strbuf_read_file(&worktree_path, path.buf, 0) <= 0) |
122 | /* invalid gitdir file */ | |
ac6c561b | 123 | goto done; |
51934904 MR |
124 | |
125 | strbuf_rtrim(&worktree_path); | |
126 | if (!strbuf_strip_suffix(&worktree_path, "/.git")) { | |
127 | strbuf_reset(&worktree_path); | |
128 | strbuf_addstr(&worktree_path, absolute_path(".")); | |
129 | strbuf_strip_suffix(&worktree_path, "/."); | |
130 | } | |
131 | ||
1ceb7f90 | 132 | strbuf_reset(&path); |
51934904 MR |
133 | strbuf_addf(&path, "%s/worktrees/%s/HEAD", get_git_common_dir(), id); |
134 | ||
92718b74 MR |
135 | if (parse_ref(path.buf, &head_ref, &is_detached) < 0) |
136 | goto done; | |
137 | ||
138 | worktree = xmalloc(sizeof(struct worktree)); | |
139 | worktree->path = strbuf_detach(&worktree_path, NULL); | |
69dfe3b9 | 140 | worktree->id = xstrdup(id); |
92718b74 MR |
141 | worktree->is_bare = 0; |
142 | worktree->head_ref = NULL; | |
143 | worktree->is_detached = is_detached; | |
750e8a60 | 144 | worktree->is_current = 0; |
92718b74 | 145 | add_head_info(&head_ref, worktree); |
ac6c561b | 146 | |
ac6c561b MR |
147 | done: |
148 | strbuf_release(&path); | |
51934904 MR |
149 | strbuf_release(&worktree_path); |
150 | strbuf_release(&head_ref); | |
151 | return worktree; | |
ac6c561b MR |
152 | } |
153 | ||
750e8a60 NTND |
154 | static void mark_current_worktree(struct worktree **worktrees) |
155 | { | |
156 | struct strbuf git_dir = STRBUF_INIT; | |
157 | struct strbuf path = STRBUF_INIT; | |
158 | int i; | |
159 | ||
160 | strbuf_addstr(&git_dir, absolute_path(get_git_dir())); | |
161 | for (i = 0; worktrees[i]; i++) { | |
162 | struct worktree *wt = worktrees[i]; | |
163 | strbuf_addstr(&path, absolute_path(get_worktree_git_dir(wt))); | |
164 | wt->is_current = !fspathcmp(git_dir.buf, path.buf); | |
165 | strbuf_reset(&path); | |
166 | if (wt->is_current) | |
167 | break; | |
168 | } | |
169 | strbuf_release(&git_dir); | |
170 | strbuf_release(&path); | |
171 | } | |
172 | ||
51934904 | 173 | struct worktree **get_worktrees(void) |
ac6c561b | 174 | { |
51934904 | 175 | struct worktree **list = NULL; |
ac6c561b MR |
176 | struct strbuf path = STRBUF_INIT; |
177 | DIR *dir; | |
178 | struct dirent *d; | |
51934904 MR |
179 | int counter = 0, alloc = 2; |
180 | ||
181 | list = xmalloc(alloc * sizeof(struct worktree *)); | |
ac6c561b | 182 | |
51934904 MR |
183 | if ((list[counter] = get_main_worktree())) |
184 | counter++; | |
ac6c561b MR |
185 | |
186 | strbuf_addf(&path, "%s/worktrees", get_git_common_dir()); | |
187 | dir = opendir(path.buf); | |
188 | strbuf_release(&path); | |
51934904 MR |
189 | if (dir) { |
190 | while ((d = readdir(dir)) != NULL) { | |
191 | struct worktree *linked = NULL; | |
192 | if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, "..")) | |
193 | continue; | |
ac6c561b | 194 | |
d4cddd66 NTND |
195 | if ((linked = get_linked_worktree(d->d_name))) { |
196 | ALLOC_GROW(list, counter + 1, alloc); | |
197 | list[counter++] = linked; | |
198 | } | |
51934904 MR |
199 | } |
200 | closedir(dir); | |
201 | } | |
202 | ALLOC_GROW(list, counter + 1, alloc); | |
203 | list[counter] = NULL; | |
750e8a60 NTND |
204 | |
205 | mark_current_worktree(list); | |
51934904 MR |
206 | return list; |
207 | } | |
208 | ||
69dfe3b9 NTND |
209 | const char *get_worktree_git_dir(const struct worktree *wt) |
210 | { | |
211 | if (!wt) | |
212 | return get_git_dir(); | |
213 | else if (!wt->id) | |
214 | return get_git_common_dir(); | |
215 | else | |
216 | return git_common_path("worktrees/%s", wt->id); | |
217 | } | |
218 | ||
14ace5b7 NTND |
219 | int is_worktree_being_rebased(const struct worktree *wt, |
220 | const char *target) | |
8d9fdd70 NTND |
221 | { |
222 | struct wt_status_state state; | |
223 | int found_rebase; | |
224 | ||
225 | memset(&state, 0, sizeof(state)); | |
226 | found_rebase = wt_status_check_rebase(wt, &state) && | |
227 | ((state.rebase_in_progress || | |
228 | state.rebase_interactive_in_progress) && | |
229 | state.branch && | |
230 | starts_with(target, "refs/heads/") && | |
231 | !strcmp(state.branch, target + strlen("refs/heads/"))); | |
232 | free(state.branch); | |
233 | free(state.onto); | |
234 | return found_rebase; | |
235 | } | |
236 | ||
14ace5b7 NTND |
237 | int is_worktree_being_bisected(const struct worktree *wt, |
238 | const char *target) | |
51934904 | 239 | { |
04a3dfb8 NTND |
240 | struct wt_status_state state; |
241 | int found_rebase; | |
242 | ||
243 | memset(&state, 0, sizeof(state)); | |
244 | found_rebase = wt_status_check_bisect(wt, &state) && | |
245 | state.branch && | |
246 | starts_with(target, "refs/heads/") && | |
247 | !strcmp(state.branch, target + strlen("refs/heads/")); | |
248 | free(state.branch); | |
249 | return found_rebase; | |
250 | } | |
251 | ||
8d9fdd70 NTND |
252 | /* |
253 | * note: this function should be able to detect shared symref even if | |
254 | * HEAD is temporarily detached (e.g. in the middle of rebase or | |
255 | * bisect). New commands that do similar things should update this | |
256 | * function as well. | |
257 | */ | |
d3b9ac07 NTND |
258 | const struct worktree *find_shared_symref(const char *symref, |
259 | const char *target) | |
51934904 | 260 | { |
d3b9ac07 | 261 | const struct worktree *existing = NULL; |
51934904 MR |
262 | struct strbuf path = STRBUF_INIT; |
263 | struct strbuf sb = STRBUF_INIT; | |
d3b9ac07 | 264 | static struct worktree **worktrees; |
51934904 MR |
265 | int i = 0; |
266 | ||
d3b9ac07 NTND |
267 | if (worktrees) |
268 | free_worktrees(worktrees); | |
269 | worktrees = get_worktrees(); | |
270 | ||
51934904 | 271 | for (i = 0; worktrees[i]; i++) { |
c8717148 NTND |
272 | struct worktree *wt = worktrees[i]; |
273 | ||
8d9fdd70 NTND |
274 | if (wt->is_detached && !strcmp(symref, "HEAD")) { |
275 | if (is_worktree_being_rebased(wt, target)) { | |
276 | existing = wt; | |
277 | break; | |
278 | } | |
04a3dfb8 NTND |
279 | if (is_worktree_being_bisected(wt, target)) { |
280 | existing = wt; | |
281 | break; | |
282 | } | |
8d9fdd70 NTND |
283 | } |
284 | ||
51934904 MR |
285 | strbuf_reset(&path); |
286 | strbuf_reset(&sb); | |
69dfe3b9 | 287 | strbuf_addf(&path, "%s/%s", |
c8717148 | 288 | get_worktree_git_dir(wt), |
69dfe3b9 | 289 | symref); |
51934904 MR |
290 | |
291 | if (parse_ref(path.buf, &sb, NULL)) { | |
ac6c561b | 292 | continue; |
51934904 MR |
293 | } |
294 | ||
295 | if (!strcmp(sb.buf, target)) { | |
c8717148 | 296 | existing = wt; |
51934904 MR |
297 | break; |
298 | } | |
ac6c561b | 299 | } |
51934904 MR |
300 | |
301 | strbuf_release(&path); | |
302 | strbuf_release(&sb); | |
ac6c561b MR |
303 | |
304 | return existing; | |
305 | } |